<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
	<?php
	$hola="que tal?<br>";
	
	echo"$hola";
	echo'$hola';
	$x=4;
	$y=5;
	echo"$x+$y<br>";
	$sum=$x+$y;
	echo"$sum<br>";
	
	?>
</body>
</html>